American Board of Ophthalmology (ABO) Practice Exam

What is the primary purpose of anti-reflective coatings on eyeglasses?

1. To enhance color

2. To reduce glare

3. To increase durability

4. To provide UV protection

The correct answer is: To reduce glare

The primary purpose of anti-reflective coatings on eyeglasses is to reduce glare. These coatings are designed to minimize the amount of light that reflects off the surface of the lenses, which can cause visual disturbances and discomfort, especially in bright conditions or when viewing digital screens. By allowing more light to pass through the lenses, anti-reflective coatings enhance visual clarity and comfort for the wearer. This is particularly beneficial for night driving, as it reduces the effects of headlights and streetlights that can create distractions and hinder visibility. While enhancing color, increasing durability, and providing UV protection are important considerations for lenses, these are not the main function of anti-reflective coatings. Specifically, anti-reflective coatings are not primarily intended to enhance color or increase the durability of the lenses; rather, their main role is to improve the overall visual experience by minimizing reflections and glare. Similarly, although UV protection is crucial, it is usually addressed through different lens treatments and is not the primary aim of anti-reflective coatings.